In the NaturalONE Help one can navigate to the following page:
Software AG Designer Guides > NaturalONE Help > Application Development > Natural for Ajax > Typical Page Layout
Here we can scroll down to the property adapterlisteners of a NATPAGE element.
The keyword IAdapterListener is not linked.
Where can I find an “official” link to further documentation?
It used to be found in the legacy(?) Application Designer Java API documentation (JavaDoc).
But this seems to have disappeared from the SAG documentation site.
It also used to be locally available in the cisnatural webapp via the Application Designer Workplace under Java API but it is no more.